Abbreviations, acronyms & symbols
BMI	= Body mass index		IPPB	= Intermittent positive pressure breathing
CABG	= Coronary artery bypass grafting		LET	= Lung expansion therapy
COPD	= Chronic obstructive pulmonary disease		MEP	= Maximal expiratory pressure
CPB	= Cardiopulmonary bypass		MIP	= Maximal inspiratory pressure
CVD	= Cardiovascular diseases		MV	= Mechanical ventilation
ETT	= Endotracheal tube		NIV	= Non-invasive ventilation
ICU	= Intensive care unit		PaO2	= Blood pressure oxygen
IMV	= Invasive mechanical ventilation		PEEP	= Positive end expiration pressure
			SaO2	= Arterial oxygen saturation